Floristic composition and diversity of benthic diatoms of Lake Chalco, Mexico
Por:
Buendia-Flores, Marisela, Tavera, Rosaluz, Novelo, Eberto, Espinosa-Matias, Silvia
Publicada:
1 jul 2019
Resumen:
In the benthic diatoms of Lake Chalco species that respond to changes in
nutrients, temperature and light predominate, and show significant
ecological features to assess the disturbance caused by urban pressure,
agricultural influence and overexploitation of the aquifer. In order to
analyze the possible functionality of the aquatic environment, the
composition and dominance of species was documented in detail.
Sufficiency of sampling effort (rarefaction) was determined. The
diversity of Shannon (H') and the equity of Pielou (J') based the
characterization of the community and Simpson's dominance value (D) was
calculated to detect impoverishing processes of diversity. The diversity
was low, with a marked dominance of species in which small central
diatoms stood out. Its presence is analyzed as benthic populations, in
an environmental situation of frequent disturbance. The continuous
presence of the dominant ones, far from representing a stable state,
reveals a highly competitive ecosystem and suggests a tendency towards
the decrease of biodiversity. Three taxa constituted new records for
Mexico; one of them is new record for the Americas. The importance of
floristic studies is highlighted in this ecosystem which, although
fragile, is important because it acts as a thermal regulator in the
Chalco Valley.
Filiaciones:
Buendia-Flores, Marisela:
Univ Nacl Autonoma Mexico, Posgrad Ciencias Mar & Limnol, Av Univ 3000,Ciudad Univ, Ciudad De Mexico 04510, Mexico
Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Ciudad Universitaria, Copilco, Av. Universidad 3000, Ciudad de México, 04510, Mexico
Tavera, Rosaluz:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Ecol & Recursos Nat, Av Univ 3000,Ciudad Univ, Ciudad De Mexico 04510, Mexico
Departamento de Ecología y Recursos Naturales, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Copilco, Av. Universidad 3000, Ciudad de México, 04510, Mexico
Novelo, Eberto:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Biol Comparada, Av Univ 3000,Ciudad Univ, Ciudad De Mexico 04510, Mexico
Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Copilco, Av. Universidad 3000, Ciudad de México, 04510, Mexico
Espinosa-Matias, Silvia:
Univ Nacl Autonoma Mexico, Fac Ciencias, Dept Biol Comparada, Av Univ 3000,Ciudad Univ, Ciudad De Mexico 04510, Mexico
Departamento de Biología Comparada, Facultad de Ciencias, Universidad Nacional Autónoma de México, Ciudad Universitaria, Copilco, Av. Universidad 3000, Ciudad de México, 04510, Mexico
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